全文获取类型
收费全文 | 24402篇 |
免费 | 1411篇 |
国内免费 | 135篇 |
专业分类
耳鼻咽喉 | 249篇 |
儿科学 | 625篇 |
妇产科学 | 502篇 |
基础医学 | 3667篇 |
口腔科学 | 1043篇 |
临床医学 | 2176篇 |
内科学 | 5662篇 |
皮肤病学 | 669篇 |
神经病学 | 2133篇 |
特种医学 | 562篇 |
外科学 | 2203篇 |
综合类 | 50篇 |
一般理论 | 10篇 |
预防医学 | 2333篇 |
眼科学 | 477篇 |
药学 | 1645篇 |
中国医学 | 112篇 |
肿瘤学 | 1830篇 |
出版年
2024年 | 33篇 |
2023年 | 255篇 |
2022年 | 602篇 |
2021年 | 1023篇 |
2020年 | 612篇 |
2019年 | 818篇 |
2018年 | 929篇 |
2017年 | 643篇 |
2016年 | 769篇 |
2015年 | 837篇 |
2014年 | 1108篇 |
2013年 | 1403篇 |
2012年 | 2191篇 |
2011年 | 2287篇 |
2010年 | 1198篇 |
2009年 | 985篇 |
2008年 | 1684篇 |
2007年 | 1624篇 |
2006年 | 1477篇 |
2005年 | 1366篇 |
2004年 | 1186篇 |
2003年 | 1000篇 |
2002年 | 880篇 |
2001年 | 96篇 |
2000年 | 65篇 |
1999年 | 86篇 |
1998年 | 124篇 |
1997年 | 106篇 |
1996年 | 86篇 |
1995年 | 65篇 |
1994年 | 56篇 |
1993年 | 57篇 |
1992年 | 39篇 |
1991年 | 34篇 |
1990年 | 27篇 |
1989年 | 29篇 |
1988年 | 22篇 |
1987年 | 11篇 |
1986年 | 22篇 |
1985年 | 17篇 |
1984年 | 26篇 |
1983年 | 14篇 |
1982年 | 16篇 |
1981年 | 10篇 |
1980年 | 3篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 5篇 |
1975年 | 2篇 |
1974年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
Alessandro Beneduce MD Cristina Capogrosso MD Francesco Moroni MD Francesco Ancona MD Giulio Falasconi MD Luigi Pannone MD Stefano Stella MD Giacomo Ingallina MD Francesco Melillo MD Marco Bruno Ancona MD Vittorio Romano RT Anna Palmisano MD Azeem Latib MD Antonio Colombo MD Matteo Montorfano MD Antonio Esposito MD Eustachio Agricola MD 《Echocardiography (Mount Kisco, N.Y.)》2020,37(12):2071-2081
993.
994.
Roxana Cristina Rimbaş Sorina Mihăilă Baldea Ruxandra Drăgoi Galrinho Antunes Guerra Simona Ionela Visoiu Mihai Rimbaş Corina Silvia Pop Dragoş Vinereanu 《Ultrasound in medicine & biology》2018,44(3):562-574
There are no clear recommendations regarding cirrhotic cardiomyopathy (CC) evaluation in patients with pre-transplant liver cirrhosis. The roles of new methods, tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE) in the diagnosis and prognosis of cirrhotic cardiomyopathy remain controversial. We investigated the utility of TDI/STE parameters in cirrhotic cardiomyopathy diagnosis and also in predicting mortality in patients with liver cirrhosis. Left/right ventricular function was studied using conventional TDI (velocities) and STE (strain/strain rate). We assessed left ventricular diastolic dysfunction, graded into four new classes (I/Ia/II/III). Serum NTproBNP (N-terminal prohormone of brain natriuretic peptide), troponin I, β-crosslaps, QTc interval, arterial compliance and endothelial function were measured. Liver-specific scores (Child–Pugh, MELD, MELDNa) were computed. There was a 1-y follow-up visit to determine mortality. We observed resting biventricular diastolic myocardial dysfunction, not presently included in the definition of cirrhotic cardiomyopathy. We provided an improved characterization of cardiac dysfunction in patients with liver cirrhosis. This might change the current definition. However, the utility of STE/TDI parameters in predicting long-term mortality in patients with liver cirrhosis remains controversial. 相似文献
995.
996.
Transient elastography spleen stiffness measurements in primary myelofibrosis patients: a pilot study in a single centre 下载免费PDF全文
997.
998.
999.
1000.
Concolino P Mello E Patrosso MC Penco S Zuppi C Capoluongo E 《Metabolism: clinical and experimental》2012,61(4):519-524
More than 90% of all cases of congenital adrenal hyperplasia (CAH) result from steroid 21-hydroxylase gene (CYP21A2) mutations. The CYP21A2 gene is located in the human leukocyte antigen (HLA) class III region on the short arm of chromosome 6p21.3, along with an inactive pseudogene, CYP21A1P, that is 98% homologous in its coding sequence with CYP21A2. Most CYP21A2 mutations result from intergenic recombinations between CYP21A2 and the closely linked CYP21A1P pseudogene. Rare mutations not generated by gene conversion account for only 5% to 10% of 21-hydroxylase deficiency alleles. However, detection of these rare and spontaneous mutations has continued to expand worldwide. We identified 2 novel CYP21A2 missense mutations (p.H282N and p.Y191H) in 2 Italian patients with simple-virilizing and nonclassic CAH forms. Functional analysis of these CYP21A2 mutations was performed. Functional in vitro assay for mutagenized CYP21A2 enzymes was performed in transiently transfected mammalian cells to test the residual enzyme activity and the apparent kinetic values. The residual activities obtained allowed us to classify the p.H282N and p.Y191H variants as simple-virilizing and nonclassic CAH associated mutations, respectively. These results correlate with the rate of severity of the patients' disease. This finding provides a further contribution for assisting in the diagnosis of CAH patients. 相似文献